本文实例讲述了Java程序中实现调用Python脚本的方法。分享给大家供大家参考，具体如下：
在程序开发中，有时候需要Java程序中调用相关Python脚本，以下内容记录了先关步骤和可能出现问题的解决办法。
1、在Eclipse中新建Maven工程；
2、pom.xml文件中添加如下依赖包之后update maven工程；
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<dependency> <groupId>org.python</groupId> <artifactId>jython</artifactId> <version>2.7.0</version></dependency><dependency> <groupId>org.python</groupId> <artifactId>jython-standalone</artifactId> <version>2.7.0</version></dependency> |
3、编写如下测试代码；
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import org.python.util.PythonInterpreter;public class JpythonScript { public static void main(String args[]) { PythonInterpreter interpreter = new PythonInterpreter(); interpreter.exec("days=('mod','Tue','Wed','Thu','Fri','Sat','Sun'); "); interpreter.exec("print days[1];"); }} |
4、测试：
出现如下错误：
console: Failed to install '': java.nio.charset.UnsupportedCharsetException: cp0.
Exception in thread "main" ImportError: Cannot import site module and its dependencies: No module named site
Determine if the following attributes are correct:
* sys.path: ['...python\\jython\\2.7.0\\Lib', '__classpath__', '__pyclasspath__/']
This attribute might be including the wrong directories, such as from CPython
* sys.prefix:***\jython\2.7.0
This attribute is set by the system property python.home, although it can
be often automatically determined by the location of the Jython jar file
You can use the -S option or python.import.site=false to not import the site module
5、问题解决：
重构代码如下：
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import java.util.Properties;import org.python.util.PythonInterpreter;public class JpythonScript { public static void main(String args[]) { Properties props = new Properties(); props.put("python.home", "path to the Lib folder"); props.put("python.console.encoding", "UTF-8"); props.put("python.security.respectJavaAccessibility", "false"); props.put("python.import.site", "false"); Properties preprops = System.getProperties(); PythonInterpreter.initialize(preprops, props, new String[0]); PythonInterpreter interpreter = new PythonInterpreter(); interpreter.exec("days=('mod','Tue','Wed','Thu','Fri','Sat','Sun'); "); interpreter.exec("print days[1];"); }} |
6、编译成功。
7、解决问题参考：
http://bugs.jython.org/issue2355
补充：jpython抛错Cannot import site module的解决方法
Exception in thread "main" ImportError: Cannot import site module and its dependencies: No module named site
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public class JpythonScript { public static void main(String args[]) { Properties props = new Properties(); props.put("python.import.site", "false"); Properties preprops = System.getProperties(); PythonInterpreter.initialize(preprops, props, new String[0]); PythonInterpreter interpreter = new PythonInterpreter(); interpreter.exec("days=('mod','Tue','Wed','Thu','Fri','Sat','Sun'); "); interpreter.exec("print days[1];"); } |
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// 进行复杂类接受处理Map<String, Object> res = new HashMap<String, Object>();res.put("1", "Danny");res.put("2", "Fanny");PythonInterpreter interpM = new PythonInterpreter();interpM.execfile("./src/com/DataDeal.py");PyFunction pyFunctionM = (PyFunction) interpM.get("main", PyFunction.class);Map<PyObject, PyObject> tableM = new HashMap<PyObject, PyObject>();tableM.put(new PyString("conf"), PyJavaType.wrapJavaObject(res));PyDictionary pydM = new PyDictionary(tableM); |
希望本文所述对大家java程序设计有所帮助。
原文链接：http://www.cnblogs.com/liinux/p/5481849.html
